Improvement in machines for round tenons



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UNITED STATES PATENT OFFICE.

IRA L. BEOKWITH, OF PROVIDENCE, RHODE ISLAND.

IMPROVEMENT IN MACHINES FOR ROUND TENONS.

To all whom it may concern:

Be it known that I, IRA L. BECKWITH, a resident of the city and county of Providence, and State of Rhode Island, have invented anew and useful or Improved Machine for Making Round Tenons on Wheel-Spokes; and I do hereby declare the same to be fully described in the following specification, and represen ted in the accompanying drawings, of which- Figure l is an end view, and Fig. 2 a side elevation, of it as complete. Fig. 3 is a side view, and Fig. 4 a longitudinal section, of the stock. Fig. 5 is a side view ot' the guidetube. Fig. 6 is a top view, and Fig. 7 is a side view, of one of the adjustable cutter-carrie-rs. Fig. 8 is a vertical section of the cutter, its adjustable carrier, the cutter-rest, and the clamp screw ofthe said carrier. Fig. 9 is a longitudinal section ofthe machine.

The purpose of my said invention is to enable the stock and cutter or cutters ot' my said machine to be used in the producing vtenons ot various sizes, the requisite changes in the machine for adapting it for such being hereinafter explained.

In the drawings, A denotes the cutterstock,it being made with a round head, a, and a cylindrical or other proper shaped body, b, the head being flat on its operating-face c. The said stock is constructed with one or more inclined recesses, d, each being for the reception of a chisel or cutter, c, and its adjustable carrier 7a, which are arranged in such -recess in manne-r as shown in the drawings,

the cutter c having its upper surface borne against a rest, j', constituting the upper side ofthe said recess. Such recess also serves as a chip mouth or passage for the reception and discharge ofthe chips made by the cutter, and opens into a cylindrical socket, g, made axially in thel stock A, and perpeinlicularly to its face c. This socket is for the reception of a separate guide tube, B, having a cylindrical bore, h, and beingprovided With one or more recesses, fi, in its side, each ot' such recesses being so formed as to receive one ofthe cutters and its carrier, as they project inward from the recess d.. rIhe outer edge of each cutter abuts against a shoulder, l, formed on its adjustable carrier 7c, the said carrier being pressed up against the cutter, so as to force it up to its restf, by means ot a clamping-screw,

m, arranged as shown in Figs. l and 8. Furthermore, a screw, n, goes through each carrier 7c, and screws into the head a of the. stock A. By turning up each of the screws n n both the cutter and its carrier next adjacent to such screw will be pressed rlnly against the guide-tubeB, and in such ainanner as not only to secure the said tube in place in its socket, but to bring the inner termination of the cutting-edge of each cutter into the circumference ot' the bore of the socket-tube. It is intended to have for the cutterstock a series of guide-tubes, each being ot the same size or diameter externally, so as to tit into the socket g. The bores oi' these tubes, however, are to vary in diameter in accordance with the several sizes of the tenons to be cut.

By means ot the socket g and the series ot' guide-tubes the machine may be adapted to make tenons of different sizes or diameters, as when one ot' any particular diameter may be required to be produced a guide-tube having such an internal diameter is to be inserted in the socket g, after which the cutter or cutters should be forced upinto the recesses of the said tube and be clamped tightly in and to the stock. By pressing a spoke endwise against the guide-tube and cutters, so that the said end ot' the spoke may cover the mouth of the guide-tube, and by putting the machine in revolution on its axis, We shall be able to form a cylindrical tenon on the spoke.

I claim- 1. The improved spoke-tenoningtool or machine, as provided not only with the separate guide-tube B and its socket g, but'as having one or more adjustable cutter-carriers, 7c lr, made and applied to its stock A, substantially as hereinbetore specified.

2. The guide-tube B, as made with a recess, t', for the reception of the cutter and its carrier, such recess being arranged in the said guide-tube, as and for the purpose specified.

3. The arrangement of the cutterrest f, the adjust-able cutter carrier 7c, and the clamping and adjustable screws or devices n n ot' the latter.v

IRA L. BECKWITH.

Witnesses:

It. H. EDDY, F. P. HALE, .I r. 

